TIPS FOR CLASS
XII CHEMISTRY
Ø Know the marks each chapter carries. For example, P–block elements alone have a weightage of more than 11%. It includes preparation of substances like chlorine, hydrogen chloride, sulphuric acid, nitric acid, oxides & oxoacids of nitrogen, phosphorus, sulphur and halogens. At the last minute, focus on oxidizing, reducing properties & some special properties of these compounds. Students are also expected to focus on the structural aspect using VSEPR theory
Ø In organic chemistry, stress must be laid on the following name reactions. Brown Hydroboration, Carbylamine Reaction (Isocyanide Test), Cannizzaro Reaction, Clemmensen Reduction, Coupling Reaction, Rosenmund’s Reaction, Riemer-Tiemann Reaction, Friedel-Crafts Acylation Reaction, Gabriel Phthalimide Reaction, Hinsberg’s Test, Hoffmann Bromamide Reaction, Sandmeyer’s Reaction, Diazotization. These not only help in organic conversions but also in solving word problems. Distinction between pair of compounds and mechanism of organic reactions for one or two marks is generally asked in the examination
Ø Revisit Class XI concepts like hyperconlugation, inductive effect & resonance or mesomeric effect with reference to organic compounds to master reasoning questions. This helps in understanding the basic character of amines, acidity of carboxylic acids relative stability of molecules and reactivity of molecules
Ø From the physical chemistry portion, basic laws such as Raoult’s law, Henry’s law, Kohlrausch’s law, degree of dissociation, problems based on Nernst equation, colligative properties involving association and dissociation (Vant Hoff factor) should be thoroughly practised. Not more than 12 marks numerical problems are expected in the board paper
Ø Approximately 10 marks are reserved for higher order thinking skill questions
Ø Value-based questions are expected from any chapter of the prescribed syllabus
Ø Last three chapters can be really scoring as these constitute slightly more than 14% of the total paper
Ø If you have followed a study routine and have been revising your class work, there should be no need to worry. Try to keep yourself calm, positive and confident
Ø Know the marks each chapter carries. For example, P–block elements alone have a weightage of more than 11%. It includes preparation of substances like chlorine, hydrogen chloride, sulphuric acid, nitric acid, oxides & oxoacids of nitrogen, phosphorus, sulphur and halogens. At the last minute, focus on oxidizing, reducing properties & some special properties of these compounds. Students are also expected to focus on the structural aspect using VSEPR theory
Ø In organic chemistry, stress must be laid on the following name reactions. Brown Hydroboration, Carbylamine Reaction (Isocyanide Test), Cannizzaro Reaction, Clemmensen Reduction, Coupling Reaction, Rosenmund’s Reaction, Riemer-Tiemann Reaction, Friedel-Crafts Acylation Reaction, Gabriel Phthalimide Reaction, Hinsberg’s Test, Hoffmann Bromamide Reaction, Sandmeyer’s Reaction, Diazotization. These not only help in organic conversions but also in solving word problems. Distinction between pair of compounds and mechanism of organic reactions for one or two marks is generally asked in the examination
Ø Revisit Class XI concepts like hyperconlugation, inductive effect & resonance or mesomeric effect with reference to organic compounds to master reasoning questions. This helps in understanding the basic character of amines, acidity of carboxylic acids relative stability of molecules and reactivity of molecules
Ø From the physical chemistry portion, basic laws such as Raoult’s law, Henry’s law, Kohlrausch’s law, degree of dissociation, problems based on Nernst equation, colligative properties involving association and dissociation (Vant Hoff factor) should be thoroughly practised. Not more than 12 marks numerical problems are expected in the board paper
Ø Approximately 10 marks are reserved for higher order thinking skill questions
Ø Value-based questions are expected from any chapter of the prescribed syllabus
Ø Last three chapters can be really scoring as these constitute slightly more than 14% of the total paper
Ø If you have followed a study routine and have been revising your class work, there should be no need to worry. Try to keep yourself calm, positive and confident
FOR EXAMINATION
Ø Be systematic. Do not overwrite or cut Follow a sequence — write answers in ascending or descending order. Do not shuffle Do not mix questions of one part with another. This is strictly prohibited by CBSE
Ø Show proper working notes. Calculations carry marks if they have been asked for specifically in the question
Ø Write the formulae even if you are not sure of final answer. Formulae carry marks like in ratio analysis
Ø Do not leave any question, even if there is error in question
Ø Be systematic. Do not overwrite or cut Follow a sequence — write answers in ascending or descending order. Do not shuffle Do not mix questions of one part with another. This is strictly prohibited by CBSE
Ø Show proper working notes. Calculations carry marks if they have been asked for specifically in the question
Ø Write the formulae even if you are not sure of final answer. Formulae carry marks like in ratio analysis
Ø Do not leave any question, even if there is error in question
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